Refractory arch for fire boxes



May 2? ,1 19% 1,495,496

E. s. NICHOLAS REFRACTORY ARCH FOR FIRE BOXES Filed Feb; 6, 1920 WITNESSES: //v VENI'OR y ATmR/vEYJf Patented May 27, 1924.

UNETED SI rarenr EDWARD S. NICHOLAS, 015 DETROIT, MICHIGAN, ASSIGNOR TO AMERICAN ARCH COM- PANY, A CORPORATION OF DELAWARE.

REFRACTORY ARCH FOR FIRE BOXES.

Application filed February 6, 1920. Serial No. 356,760.

To all whom it may concern:

Be it known that I, EDWARD S. NICHOLAS, a citizen of the United States, residing at Detroit, in the county of IVayne and State of Michigan, have invented certain new and useful Improvements in Refractory Arches for Fire Boxes, of which the following is a specification.

This invention has reference to an arrangement of refractory arch brick for fire boxes in which a portion of the bricks are placed flatwise upon their supports and a portion edgewise with apertures adjacent to the edge supported bricks formed by the in- 1 troduction of suitable spacer members.

One of the objects of this invention is to provide an arrangement of edge supported bricks as described which will act to baffle or retard the flow of the products of combustion in certain zones or spaces and permit the accumulation in such spaces of cinders which latter in turn, as the draft is reduced, will discharge through the apertures adjacent to the baffle bricks into the com- 2 bustion space below.

A further object of the invention is the provision of an improved form of baffle brick which may be used in the manner specified in association with standard forms of those types of bricks which have become known in the art as the security arch bricks or other suitable types in the formation of a refractory arch which will keep the parts and passages clean as well as securing effective and economical combustion results.

The above, as well as such other objects as may hereinafter appear, I obtain by means of a construction which I have illustrated in preferred form in the accompanying drawing, wherein Figure 1 is a longitudinal vertical sectional view through the fire boX of a locomotive with my improvement applied thereto; Figure 2 is a transverse sectional view taken on the line 22 of Figure 1; Figure 3 is a transverse sectional view taken on the line 33 of Figure 1; Figure 4 is a partial longitudinal sectional view showing an arrangement of arch with a single row of baffle bricks resting upon edge; Figure 5 is a view similar to Figure 4, but provided with a pair of edge supported baffle bricks; and Figures 6 and 7 represent respectively, a like arrangement in which three and four rows of edge supported baffle bricks are employed in association with other refractory bricks supported in fiatwise position and assembled with suitable apertures adjacent to the baffle bricks. I

Referring now more particularly to Figure 1, it will be seen that I have therein shown a crown sheet 1, a front water leg 2, a rear water leg 3, having the usual door opening 4, and a series of circulating brick supporting tubes 5, the arch which is constructed thereon dividing the fire box into an upper and lower combustion chamber. Resting upon the circulating brick supporting tube 5, I provide bricks of usual construction 6 carried in flatwise position, but spaced apart in predetermined amount at about the middle of the arch for the introduction of arow of edgewise supported bricks 9 which project above the upper level of the flatwise bricks and at the side of which there is an aperture 8 through the arch formed by the introduction of the spacing blocks 7 shown in Figure-2.

The edge supported bricks 9 rest upon the tubes by engagement of the sockets at the lower corners and are preferably arranged with a slight opening 10 between adjacent bricks to permit ready adjustment of the edge supported bricks and also permit a slight circulating of the products of combustion between adjacent bricks.

At the sides of the arch adjacent to the wing bricks 11 which are of usual construction, I provide triangularly formed bricks 12 which rest at their inner lower corners upon tubes by means of sockets or recesses and bear at their outer ends against the inside of the side sheets 13 and 1 1.

In some cases I find it expedient to pro vide an aperture on each side of the edge supported bricks as indicated in Figure 4 in which the aperture forward of the baffle brick is marked 15, the other aperture 8 being as shown in Figure 1, both apertures being provided for by the employment of spacer blocks 7.

The flue sheet 16 shown in Figure 1 is provided with the usual arrangement of fines 17 and the relation between the baffle bricks and apertures and the flue sheet is such as will secure the most efficient flow of the products of combustion while at the same time, due to the action of the baffles, providing lodgment for a portion of the cinders which will, on reduction of the draft fall through the openings adjoining the bat fie bricks.

I claim:

1. In a locomotive fire box having front and rear water walls, a r'lue sheet, a crown sheet and circulation tubes connecting the water legs; an arch construction dividing the lire box into an upper and a lower combustion chamber and comprising in combination a plurality of bricks supported on said tubes, said bricks having a width which is greater than the depth, a number thereof being placed fiatwise on the tubes and a number edgewise with the upper edge extending above the upper surface of the fiatwise bricks and spacer blocks between the fiatwise and edgewise bricks providing apertures therebetween.

In a locomotive lire box having Water spaces and circulation tubes; an arch construction supported on said tubes and dividing the tire box into an upper and a lower combustion chamber, said arch comprising in combination a plurality of bricks certain of which project above the others to provide projections above the body of the arch, and spacer blocks on the tubes separating the upstanding bricks from the other bricks whereby to provide channels through the arch connecting the upper with the lower combustion chamber.

3. In a locomotive fire box having water spaces and upwardly and rearwardly extending circulation tubes; an arch construction dividing the tire box into an upper and lower combustion chamber and comprising in combination a plurality of bricks supported on said tubes, certain oi which bricks upstand from the balance to provide projections, and apertures through the arch adjacent upstanding bricks and on the rearward side thereof.

In testimony whereof, I have hereunto signed my name.

E. S. NICHOLAS. 

